In [1]}, [2]}, [3]} the Born–Jordan quantization of monomials in coordinates \((x_i,p_i)\)  is determined by the following general rules,
\([\hat{x}_i,\hat{p}_j]=i\hbar \delta _{ij},\qquad [\hat{x}_i, \hat{x}_j]=0,\qquad [\hat{p}_i, \hat{p}_j]=0,\) 
